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In this study, passive samplers were used to measure ozone exposure distribution maps over the historical peninsula of Istanbul, Turkey. The study area is partially important due to the presence of cultural and historical buildings and structures distributed all over the peninsula. Unesco's World Heritage list covers four zones located in this historical peninsula in Istanbul. It is necessary to evaluate the pollution distribution in high resolution to construct effective risk management strategies. For this purpose, 50 sampling stations were installed within the study area. Three sampling campaigns within different seasons (summer, winter and fall) showing different ozone distribution characteristics were carried out. Seasonal measurements of ozone exposure values were used to obtain a yearly exposure level, which is an important part of risk characterization. Seasonal ozone exposure maps over the historical peninsula were obtained using Geographical Information Systems (GIS) based interpolation models with high resolution. Risk maps including five regions, based on ozone exposure levels were created. Structures and historical regions located within these risk zones were identified. Based on the defined exposure regions, we found that the Archaeological Park, one of the items on UNESCO's list, is located within the most risky region. 相似文献
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A case study was conducted to explore teachers’ current technology use in elementary schools in Ankara, the capital of Turkey. The data were collected through a survey, and participants included 1030 classroom teachers across eight districts. The present study results revealed that significant challenges remain with regard to technology use in the classroom, even in the capital of Turkey, where teachers have advantages in terms of technology access and use compared to rural areas. The participant teachers used technologies most frequently for lesson preparation activities, rather than for delivering instruction. Although the teachers felt that school principals and colleagues were usually supportive of technology use in lessons, they complained about insufficient professional development activities and incentives. Representing a snapshot of teachers’ technology use in elementary school settings, this study sheds light on essential factors that should be considered in any technology integration process in schools. The study findings offer valuable insight for policy-makers and school leaders on how to support the technology integration process and allocate money for technology initiatives. 相似文献
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Mapping the corrosion impact of air pollution on the historical peninsula of Istanbul 总被引：2，自引：0，他引：2
Ferhat Karaca 《Journal of Cultural Heritage》2013,14(2):129-137
This paper presents the most comprehensive study conducted so far for evaluating the corrosion levels related to air quality and the seasonal pollutant (NO2, SO2, and O3) exposure levels over 50 monitoring stations distributed on the historical peninsula of Istanbul. Istanbul has been one of the most important as well as most populated major cities in the world during all the ages. Today, owing to its historical and cultural structures, the historical peninsula of Istanbul has become an attraction point of tourism and is one of the most unique and ancient urban settlement areas in the world. However, the cultural heritage stocks in the peninsula are under the risk of corrosion and critical air pollution level exposure caused by chemical reactions under the multi-pollutant situation of the air pollutants, principally SO2, NO2, and O3, as well as meteorological factors, e.g. humidity and temperature. In the present study, seasonal exposure of NO2, SO2, and O3 pollutants were monitored using passive samplers, and corrosion attack values were calculated using dose-response functions. The geostatistical analyst tool of ArcGIS® 9.1 was then used for generating GIS-based surface pollution and corrosion distribution maps. Subsequently, two hotspots were clearly identified, the tip of the peninsula and the area around the Ataturk Bridge, which fall under serious corrosion risks for copper, cast bronze, and carbon steel materials. However, no significant risk was identified for cultural heritage materials made of limestone in the peninsula. 相似文献
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B. Barla Cambazoglu Evren Karaca Tayfun Kucukyilmaz Ata Turk Cevdet Aykanat 《Information processing & management》2007
Search Engine for South-East Europe (SE4SEE) is a socio-cultural search engine running on the grid infrastructure. It offers a personalized, on-demand, country-specific, category-based Web search facility. The main goal of SE4SEE is to attack the page freshness problem by performing the search on the original pages residing on the Web, rather than on the previously fetched copies as done in the traditional search engines. SE4SEE also aims to obtain high download rates in Web crawling by making use of the geographically distributed nature of the grid. In this work, we present the architectural design issues and implementation details of this search engine. We conduct various experiments to illustrate performance results obtained on a grid infrastructure and justify the use of the search strategy employed in SE4SEE. 相似文献
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Ka?an Huysal Yasemin U. Budak Ayse Ulusoy Karaca Murat Aydos Serdar Kahvecio?lu Mehtap Bulut Murat Polat 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2013,23(2):211-217
Introduction
Urinary tract infection (UTI) is one of the most common types of infection. Currently, diagnosis is primarily based on microbiologic culture, which is time- and labor-consuming. The aim of this study was to assess the diagnostic accuracy of urinalysis results from UriSed (77 Electronica, Budapest, Hungary), an automated microscopic image-based sediment analyzer, in predicting positive urine cultures.Materials and methods:
We examined a total of 384 urine specimens from hospitalized patients and outpatients attending our hospital on the same day for urinalysis, dipstick tests and semi-quantitative urine culture. The urinalysis results were compared with those of conventional semi-quantitative urine culture.Results:
Of 384 urinary specimens, 68 were positive for bacteriuria by culture, and were thus considered true positives. Comparison of these results with those obtained from the UriSed analyzer indicated that the analyzer had a specificity of 91.1%, a sensitivity of 47.0%, a positive predictive value (PPV) of 53.3% (95% confidence interval (CI) = 40.8–65.3), and a negative predictive value (NPV) of 88.8% (95% Cl = 85.0–91.8%). The accuracy was 83.3% when the urine leukocyte parameter was used, 76.8% when bacteriuria analysis of urinary sediment was used, and 85.1% when the bacteriuria and leukocyturia parameters were combined. The presence of nitrite was the best indicator of culture positivity (99.3% specificity) but had a negative likelihood ratio of 0.7, indicating that it was not a reliable clinical test.Conclusions:
Although the specificity of the UriSed analyzer was within acceptable limits, the sensitivity value was low. Thus, UriSed urinalysis results do not accurately predict the outcome of culture. 相似文献7.
Pala Ferhat Kadir Erdem Mukaddes 《Educational technology research and development : ETR & D》2020,68(6):3213-3233
Educational technology research and development - The purpose of this study is to develop a standardized measurement tool that can be used to determine the participation styles of individuals... 相似文献
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The main purpose of this research is to examine in-service teachers' instructional beliefs about student-centered education. The inventory was designed to measure teachers' student-centered educational beliefs based on four components of the educational curriculum comprising of educational objectives, content, teaching strategies and instructional assessment. Data for the study were collected from 307 in-service teachers working at K-8 schools. A quantitative research analysis showed that in-service teachers held positive beliefs about student-centered education. In addition, the characteristics of teachers such as school level, teaching experience, teaching subject and educational background had statistically significant effects on their beliefs about student-centered education. 相似文献
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